Spark arrester



y 1929. G. CAR'PENTER 1,712,292

SPARK ARRESTER Filed April 1, 1924 A V Y mv NTOR ATTORNEYS i'llll ll atented I i STATE-S GUY CARPENTER, 01? NEW] YORK, N.

SPARK ABRESTIER.

Application filed April 1,

My invention is similar to certain of those for which I have heretofore filed applications for Letters Patent of the United States, notably those which bear {ierial Numbers (39?), 85 and ($93,186, each of which was filed Feb. 16, 1924-, and pertains to the art of arresting and separating the particles of solids from the gases in the products of contibustion in a locomotive engine, and cooling and collecting these solids. In my former applications to which I have referred I employ an inner and an outer cylinder with. a helically formed member mounted between them, and this application differs chiefly from the former ones .in that I here make use of the smoke stack itself as the inner cylinder.

My object in this invention is to simplify the construction, without detracting from the utility thereof, and I attain my object in the mann er set forth and as illustrated in the preferred construction I have chosen to illustrate in which:

Fig. 1 shows a longitudinal sectional View of the forward portion of a locomotive engine,

Fig. 2 shows a vertical sectional view taken on the line 2-2 in Fig. 1, and

Fig. 8 is a cross section, taken on the line 3-8 in Fig. 1, showing, in detail, bafiles 1%) and adj acent slots 20.

Iteference being bad to the accompanying drawings, the numeral 10 indicates the lire tubes of a locomotive engine, 11 the smoke box, 12 the smoke stack and 13 the exhaust jet, all. being common in the usual type of englues.

In the smoke box 11, between the fire tubes 10 and the stack 12, I have secured a vertically mounted partition member M which e):- tends from the base of the smoke box to near the upper portion thereof, and joining this partition and extending forwardly toerefrom to the end of the smoke box is a horizontally disposed partition member 15, which is provided. with a large opening 16 through which a cylinder 17, which depends downwardly therefrom, projects, the said cylinder being closed at its base, except for a small opening through which the exhaust jet 13 projects. ll his cylinc or 1? considerably larger than the stack 12 and surrounds it and is spaced therefrom, as shown, and in the said space is mounted a helically formed member 18 which is preferably secured to the stack, the outer periphery of its blade contacting the inner wall of the vertical cylinder 17. The helical- 1924. Serial No. 703,393.

lngs 20, in its wall. A door 21 is provided in the base of the smoke box, between the partition member 14 and the forward end of the smoke box. Obviously, the exhaust jet opens centrally beneath the lower open base of the smoke stack, and an opening is provided at each end of the helically formed member.

In practical operation the products of combustion are pulled at a high velocity by the action of the jet 18, and leaving the fire box they travel to the partition member 14, thence upwardly over the horizontally disposed member to the upper open end of the cylinder 1?, and down through the cylinder to the lower open. end of the stack 12, tln'ough which. they are expelled.

As these gases flow downwardly through the cylinder 17 a strong centrifugal. force is imparted to them through the agency of the helically formed member and the action of the jet. This causes the solids contained in them to be thrown outwardly against the inner surface of the cylinder 17 where they are caught by the bafiies and pass through the openings in the cylinder to the chamber 22 formed by the partition members 14 and'15, from which they may be removed by opening the door 21.

Having thus described my invention what I claim and desire to secure by Letters Patent of the United States, is:

1. A spark arrester for locomotive engines employing a the box, comprising, in combination, a smoke stack; a smoke box, said smoke stack extending downwardly into said smoke box; a cylinder having its upper end open and its lower end closed, surrounding the lower part of the smoke stack; a helically formed member, mounted within the said cylinder and surrounding the lower end of the smoke stack, to form a spiral passage between the outer surface of the lower end of the smoke stack and the inner wall of the cylinder, the elements being so arranged as to conduct the smoke from the fire box and into and through the aforesaid spiral passage, before said smoke reaches the smoke stack, substantially as shown and described.

2. A spark arrester for locomotive engines employing a lire box, comprising, in combination, a smoke stack; a smoke box, the lower end of the smoke stack projecting into the smoke box; a cylinder, provided with openings through its well, open at its upper end and closed at its lower end, surrounding the lower part of the smoke stack, the closed lower end of the cylinder being spaced from the lower end of the smoke stack; a helically formed member, mounted between the smoke stack and the cylinder, to form a spiral passage between said smoke stack and said cylinder, the elements'being so arranged as to conduct the smoke from the fire box to, and through, the spiral passage, before said smoke reaches the smoke stack, substantially as shown and described.

3. A spark arrester for locomotive engines employing a fire box, comprising, in combination, a smoke stack; a smoke box, the lower end of the smoke stack projecting into the smoke box; a cylinder, provided with openings through its wall, open at its upper end and closed at its lower end, surrounding the lower part of the smoke stack, the closed lower end of the cylinder being spaced from the lower end of the smoke stack; bafiles on the inner wall of said cylinder, a baflle being adjacent each of the openings in the cylinder; a helically formed member, mounted between the smoke stack and the cylinder, to form a spiral passage between said smoke stack and said cylinder, the elements being so arranged as to conduct the smoke from the fire box to, and through, the spiral passage, before said smoke reaches the smoke stack, substantially as shown and described.

GUY CARPENTER. 

